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| ydsk |
 Posted: Wed Mar 07, 2007 2:02 pm Post subject: length of IIH and MQMD |
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Chevalier
Joined: 23 May 2005
Posts: 410
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Is the length of the IIH and MQMD headers constant ? Or does it change ?
I think IIH is around 84 bytes, I 'm not sure about MQMD.
Can someone pls let me know.
thank you.
ydsk. |
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| EddieA |
| Posted: Wed Mar 07, 2007 4:25 pm Post subject: |
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Jedi
Joined: 28 Jun 2001
Posts: 2453
Location: Los Angeles
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The MQMD is a fixed size, depending on the version. But, you always get that in a seperate storage area from the message payload, which would include the IIH.
Cheers,
_________________
Eddie Atherton
IBM Certified Solution Developer - WebSphere Message Broker V6.1
IBM Certified Solution Developer - WebSphere Message Broker V7.0 |
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| ydsk |
| Posted: Wed Mar 07, 2007 5:22 pm Post subject: |
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Chevalier
Joined: 23 May 2005
Posts: 410
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Eddie,
thanks, I think there 2 versions of MQMD , 1 and 2.
Most of the new applications use version 2, if I am not wrong. Can you pls tell me its size ?
And I know IIH is part of payload but not sure of its length.
Pls let me know.
Thanks.
ydsk. |
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| kevinf2349 |
| Posted: Wed Mar 07, 2007 7:18 pm Post subject: |
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Grand Master
Joined: 28 Feb 2003
Posts: 1311
Location: USA
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| ydsk wrote: |
Most of the new applications use version 2, if I am not wrong. Can you pls tell me its size ?
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The length is included as part of the MD description IIRC.
IMHO it is bad programming to hardcode the length, especially when the length is avaible as part of the descriptor. What language are you using?...and why do you need to worry about the length anyway? |
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| ydsk |
| Posted: Thu Mar 08, 2007 7:24 am Post subject: |
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Chevalier
Joined: 23 May 2005
Posts: 410
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there is an existing program with a fixed buffer size and I need to change the program to make it work with MQ.
So, I need to know the length of a message including all its headers.
thnx.
ydsk. |
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| Vitor |
| Posted: Thu Mar 08, 2007 7:44 am Post subject: |
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Grand High Poobah
Joined: 11 Nov 2005
Posts: 26093
Location: Texas, USA
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| ydsk wrote: |
there is an existing program with a fixed buffer size and I need to change the program to make it work with MQ.
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MQMD should not be returned in the message buffer but in a separate area. For the record IIRC it's 334 bytes.
Best way to obtain a more accurate figure is to sum the length of the fields; it's fixed length.
_________________
Honesty is the best policy.
Insanity is the best defence. |
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